Build platform



FIG. 1 is a perspective view of a build platform depicting the new design;

FIG. 2 is a top plan view of the build platform;

FIG. 3 is a bottom plan view of the build platform;

FIG. 4 is a front elevation view of the build platform;

FIG. 5 is a rear elevation view of the build platform;

FIG. 6 is a right side elevation view of the build platform; and,

FIG. 7 is a left side elevation view of the build platform. 

The ornamental design for a build platform, as shown and described. 